KECK, HELMUT: search on Z-Library

The world's largest scientific articles store. 70,000,000+ articles for free.

Don't use scam websites

1

Thirty years of numerical flow simulation in hydraulic turbomachines

Helmut Keck, Mirjam Sick

Journal:

Year:

2008

Language:

english

File:

PDF, 1.83 MB

english, 2008

2

Fragmentation and isomerization of ionized trimethylphosphine sulfide (CH3)3P(S): ion structures andab initio MO calculations

Keck, Helmut, Tommes, Peter

Journal:

Journal of Mass Spectrometry

Year:

1999

Language:

english

File:

PDF, 137 KB

english, 1999

3

Koordinationspolymere Metallkomplexe bifunktioneller Dithiophosphinsäuren und ihre Verwendung als Adsorbentien in der Chromatographie

Prof. Wilhelm Kuchen, Jürgen Delventhal, Helmut Keck

Journal:

Angewandte Chemie

Year:

1972

Language:

german

File:

PDF, 189 KB

german, 1972

4

Koordinationspolymere Metallkomplexe als stationäre Phase in der Gaschromatographie

Dipl.-Chem. Jürgen Delventhal, Dipl.-Chem. Helmut Keck, Prof. Wilhelm Kuchen

Journal:

Angewandte Chemie

Year:

1972

Language:

german

File:

PDF, 75 KB

german, 1972

5

Synthese von Dithiophosphinatokomplexen mit Bis(diorganothiophosphoryl)disulfanen: Mo3S7-Cluster-dithiophosphinate

Prof. Dr. Helmut Keck, Dr. Wilhelm Kuchen, Dipl.-Chem. Jürgen Mathow, Beate Meyer, Prof. Dr. Dietrich Mootz, Dr. Hartmut Wunderlich

Journal:

Angewandte Chemie

Year:

1981

Language:

german

File:

PDF, 244 KB

german, 1981

6

Koordinativ ungesättigte dreikernige Molybdän-Schwefel-Clusterchelate mit Dithiophosphinato-Brücke

Dr. Helmut Keck, Prof. Dr. Wilhelm Kuchen, Jürgen Mathow, Dr. Hartmut Wunderlich

Journal:

Angewandte Chemie

Year:

1982

Language:

german

File:

PDF, 203 KB

german, 1982

7

RS - P S in der Gasphase - erstmalige Erzeugung von (Organothio)thioxophosphanen

Dr. Helmut Keck, Prof. Dr. Wilhelm Kuchen, Heike Renneberg, Prof. Dr. Johan K. Terlouw, Herman C. Visser

Journal:

Angewandte Chemie

Year:

1991

Language:

german

File:

PDF, 348 KB

german, 1991

8

Das Phosphor-Ylid CH2PH3 ist stabil in der Gasphase

Dr. Helmut Keck, Prof. Dr. Wilhelm Kuchen, Peter Tommes, Prof. Dr. Johan K. Terlouw, Thomas Wong

Journal:

Angewandte Chemie

Year:

1992

Language:

german

File:

PDF, 263 KB

german, 1992

9

Coordination-Polymeric Metal Complexes of Bifunctional Dithiophosphinic Acids and Their Use as Adsorbents in Chromatography

Prof. Wilhelm Kuchen, DipI-Chem. Jürgen Delventhal, Dipl.-Chem. Helmut Keck

Journal:

Angewandte Chemie International Edition

Year:

1972

Language:

english

File:

PDF, 177 KB

english, 1972

10

Coordination-Polymeric Metal Complexes as Stationary Phases in Gas Chromatography

Dipl.-Chem. Jürgen Delventhal, Dipl.-Chem. Helmut Keck, Prof. Wilhelm Kuchen

Journal:

Angewandte Chemie International Edition

Year:

1972

Language:

english

File:

PDF, 116 KB

english, 1972

11

Synthesis of Dithiophosphinato Complexes with Bis(diorganothiophilosphoryl)disulfanes: Mo3S7-Cluster Dithiophosphinates

Dr. Helmut Keck, Dr. Wilhelm Kuclhen, Dipl.-Chem. Jürgen Mathow, cand. rer. nat. Beate Meyer, Prof. Dr. Dietrich Mootz, Hartmut Wunderlich

Journal:

Angewandte Chemie International Edition

Year:

1981

Language:

english

File:

PDF, 216 KB

english, 1981

12

Coordinatively Unsaturated Trinuclear Molybdenum-Sulfur Cluster Chelates with Dithiophosphinato Bridge

Dr. Helmut Keck, Prof. Dr. Wilhelm Kuchen, Jürgen Mathow, Dr. Hartmut Wunderlich

Journal:

Angewandte Chemie International Edition

Year:

1982

Language:

english

File:

PDF, 212 KB

english, 1982

13

Koordinativ ungesättigte dreikernige Molybdän-Schwefel-Clusterchelate mit Dithiophosphinatobrücke

Dr. Helmut Keck, Prof. Dr. Wilhelm Kuchen, Dipl.-Chem. Jürgen Mathow, Dr. Hartmut Wunderlich

Journal:

Angewandte Chemie International Edition

Year:

1982

Language:

german

File:

PDF, 170 KB

german, 1982

14

RS-PS in the Gas Phase—First Generation of (Organothio)thioxophosphanes

Dr. Helmut Keck, Prof. Dr. Wilhelm Kuchen, Dipl.-Chem. Heike Renneberg, Prof. Dr. Johan K. Terlouw, Herman C. Visser

Journal:

Angewandte Chemie International Edition

Year:

1991

Language:

english

File:

PDF, 350 KB

english, 1991

15

The Phosphorus Ylide CH2PH3 is Stable in the Gas Phase

Dr. Helmut Keck, Prof. Dr. Wilhelm Kuchen, Dipl.-Chem. Peter Tommes, Prof. Dr. Johan K. Terlouw, Thomas Wong

Journal:

Angewandte Chemie International Edition

Year:

1992

Language:

english

File:

PDF, 316 KB

english, 1992

16

Metallkomplexe der Phosphinsäuren, X. Koordinationspolymere Metallkomplexe der p-Phenylenbis-(p-methoxyphenyldithiophosphinsäure)

Wilhelm Kuchen, Jürgen Delventhal, Helmut Keck

Journal:

European Journal of Inorganic Chemistry

Year:

1974

File:

PDF, 445 KB

1974

17

Niedermolekulare Phosphorsulfide in der Gasphase

Helmut Keck, Wilhelm Kuchen, Heike Renneberg, Johan K. Terlouw, Herman C. Visser

Journal:

European Journal of Inorganic Chemistry

Year:

1989

File:

PDF, 312 KB

1989

18

Zur Kenntnis des „Phosphormonosulfids” (PS)x

Angelika Frehn, Helmut Keck, Wilhelm Kuchen

Journal:

European Journal of Inorganic Chemistry

Year:

1990

Language:

german

File:

PDF, 249 KB

german, 1990

19

Type B Semiconductor Photocatalysis: The Synthesis of Homoallyl Amines by Cadmium Sulfide-Catalyzed Linear Photoaddition of Olefins and Enol/allyl Ethers to N-Phenylbenzophenone Imine

Helmut Keck, Dr. Wolfram Schindler, Dr. Falk Knoch, Prof. Dr. Horst Kisch

Journal:

Chemistry - A European Journal

Year:

1997

Language:

english

File:

PDF, 902 KB

english, 1997

20

ChemInform Abstract: N-Dimethylphosphinoyl-Substituted Aminomethanephosphonic Acids

Victoria Lachkova, Sabi Varbanov, Walter Frank, Helmut Keck

Journal:

Year:

2010

File:

PDF, 27 KB

2010

21

Massenspektrometrische Untersuchungen an Organophosphorverbindungen. II—Elektronenstoßinduzierte Fragmentierungen von Tetraorganodiphosphandisulfiden

Helmut Keck, Wilhelm Kuchen

Journal:

Journal of Mass Spectrometry

Year:

1979

File:

PDF, 495 KB

1979

22

Mass spectrometric studies of organophosphorus compounds: III—Remarkable migration of chalcogen on electron impact of organophosphorus compounds

Helmut Keck, Wilhelm Kuchen, Hans F. Mahler

Journal:

Journal of Mass Spectrometry

Year:

1980

Language:

english

File:

PDF, 168 KB

english, 1980

23

Fragmentation characteristics of trialkylphosphane oxides, R3P(O)

Helmut Keck, Wilhelm Kuchen, Sabine Kühlborn

Journal:

Journal of Mass Spectrometry

Year:

1988

Language:

english

File:

PDF, 284 KB

english, 1988

24

Stepwise synthesis of trimetallic dithiophosphinato clusters containing a cubane-type Mo2WCuS4 cluster core

Hansjörg Diller, Helmut Keck, Hartmut Wunderlich, Wilhelm Kuchen

Journal:

Journal of Organometallic Chemistry

Year:

1995

Language:

english

File:

PDF, 376 KB

english, 1995

25

Synthesis, properties and structure of bis(dialkyldithiophosphinato)manganese(II) complexes

Christoph Denger, Helmut Keck, Wilhelm Kuchen, Jürgen Mathow, Hartmut Wunderlich

Journal:

Inorganica Chimica Acta

Year:

1987

Language:

english

File:

PDF, 307 KB

english, 1987

26

Gaschromatographische Trennungen von Lewis-Basen an Nickel(II)-dithiophosphinatokomplexen [RR′P(S)S]2Ni

Jürgen Delventhal, Helmut Keck, Wilhelm Kuchen

Journal:

Journal of Chromatography A

Year:

1973

File:

PDF, 202 KB

1973

27

The radical cation of trimethylphosphine oxide

Ruomei Li, Andreas Schweighofer, Helmut Keck, Wilhelm Kuchen, Hilkka I. Kenttamaa

Journal:

International Journal of Mass Spectrometry and Ion Processes

Year:

1996

Language:

english

File:

PDF, 713 KB

english, 1996

28

Specificity of hydrogen migration on alkene elimination from trialkylphosphine sulphide cations

Reinhard Janoschka, Helmut Keck, Wilhelm Kuchen

Journal:

Rapid Communications in Mass Spectrometry

Year:

1989

Language:

english

File:

PDF, 205 KB

english, 1989

29

Triphosphorus disulfide: The elusive P3S radical generated and identified by neutralization/reionization mass spectrometry

Helmut Keck, Wilhelm Kuchen, Peter Tommes, Thomas Wong, Johan K. Terlouw

Journal:

Rapid Communications in Mass Spectrometry

Year:

1992

Language:

english

File:

PDF, 279 KB

english, 1992

30

Mehrkernige Molybdän- und Wolframkomplexe mit Schwefel- und Dithiophosphinatoliganden

Dr. Helmut Keck, Prof. Dr. Wilhelm Kuchen, Dr. Jürgen Mathow

Journal:

Zeitschrift für anorganische und allgemeine Chemie

Year:

1986

Language:

german

File:

PDF, 721 KB

german, 1986

31

Gasförmiges „H3PS2” – Erzeugung und Charakterisierung

Dr. Helmut Keck, Prof. Dr. Wilhelm Kuchen, Heike Renneberg, Dr. Johan K. Terlouw, Herman C. Visser

Journal:

Zeitschrift für anorganische und allgemeine Chemie

Year:

1990

File:

PDF, 375 KB

1990

32

Chemisorptionschromatographie mit dithiophosphinatokomplexen

Jürgen Delventhal, Helmut Keck, Wilhelm Kuchen

Journal:

Journal of Chromatography A

Year:

1974

File:

PDF, 276 KB

1974

33

10.1038/35008626

Haass, Christian, Capell, Anja, Steiner, Harald, Romig, Helmut, Keck, Simone, Baader, Miriam, Grim, Melissa G., Baumeister, Ralf

Journal:

Nature Cell Biology

Year:

2000

Language:

english

File:

PDF, 599 KB

english, 2000

34

The radical anions of thioxophosphane H-PS and its tautomer thiohydroxyphosphinidene H-S-P — an ab initio study

Helmut Keck, Wilhelm Kuchen, Peter Tommes

Journal:

Journal of Molecular Structure: THEOCHEM

Year:

1993

Language:

english

File:

PDF, 392 KB

english, 1993

35

Urea and Thiourea Derivatives of Bis(dimethyl-phosphinoylmethyl)-amine

Lachkova, Viktoria, Varbanov, Sabi, Hägele, Gerhard, Keck, Helmut, Tosheva, Tania

Journal:

Phosphorus Sulfur and Silicon and the Related Elements

Year:

2002

Language:

english

File:

PDF, 132 KB

english, 2002

36

Analysis of Bevacizumab-based Preoperative Radiochemotherapy in Patients with Locally Advanced Rectal Cancer on Surgery-associated Spectrum of Complications

Dellas, Kathrin, Buller, Johannes, GÃ¶rtz, Gregor JÃ¼rgen, Richter, Michael, HÃ¶hler, Thomas, Arnold, Dirk, Keck, Tobias, Dunst, JÃ¼rgen, ZÃ¼hlke, Helmut

Journal:

Annals of Surgical Oncology

Year:

2014

Language:

english

File:

PDF, 216 KB

english, 2014

37

Investigations on Polymeric and Monomeric Intramolecularly Hydrogen-Bridged UV Absorbers of the Benzotriazole and Triazine Class

Keck, Jürgen, Kramer, Horst E. A., Port, Helmut, Hirsch, Thomas, Fischer, Peter, Rytz, Gerhard

Journal:

Journal of Physical Chemistry

Year:

1996

Language:

english

File:

PDF, 673 KB

english, 1996

38

Unusual Reactivity of the Radical Cations of Some Simple Trivalent Organophosphorus Compounds toward Dimethyl Disulfide and Dimethyl Diselenide

Smith, Rebecca L., Schweighofer, Andreas, Keck, Helmut, Kuchen, Wilhelm, Kenttämaa, Hilkka I.

Journal:

Journal of the American Chemical Society

Year:

1996

Language:

english

File:

PDF, 156 KB

english, 1996

39

The thioxophosphane HP:S and its tautomer HSP, (thiohydroxy)phosphinidene, are stable in the gas phase

Wong, Thomas, Terlouw, Johan K., Keck, Helmut, Kuchen, Wilhelm, Tommes, Peter

Journal:

Journal of the American Chemical Society

Year:

1992

Language:

english

File:

PDF, 397 KB

english, 1992

40

Influence of Polymer Matrixes on the Photophysical Properties of UV Absorbers †

Stein, Martin, Keck, Juergen, Waiblinger, Frank, Fluegge, Anja P., Kramer, Horst E. A., Hartschuh, Achim, Port, Helmut, Leppard, David, Rytz, Gerhard

Journal:

Journal of Physical Chemistry A

Year:

2002

Language:

english

File:

PDF, 214 KB

english, 2002

41

The Prototypical Organophosphorus Ylidion • CH 2 PH 3+

Schweighofer, Andreas, Chou, Phillip K., Thoen, Kami K., Nanayakkara, Vajira K., Keck, Helmut, Kuchen, Wilhelm, Kenttämaa, Hilkka I.

Journal:

Journal of the American Chemical Society

Year:

1996

Language:

english

File:

PDF, 157 KB

english, 1996

42

Influence of Polymer Matrices on the Photophysical Properties of UV Absorbers

Stein, Martin, Keck, Juergen, Waiblinger, Frank, Fluegge, Anja P., Kramer, Horst E. A., Hartschuh, Achim, Port, Helmut, Leppard, David, Rytz, Gerhard

Journal:

Journal of Physical Chemistry A

Year:

2002

Language:

english

File:

PDF, 6 KB

english, 2002

43

MASSENSPEKTROMETRISCHE UNTERSUCHUNGEN AN ORGANOPHOSPHORVERBINDUNGEN VI. ÜBER DIE MASSENSPEKTROMETRIE VON DIETHYLTHIOPHOSPHINSÄUREALKYLESTERN UND DIE MASSENSPEKTROMETRISCHE UNTERSCHEIDUNG IHRER O, S -ISOMEREN 2

Keck, Helmut, Kuchen, Wilhelm, Kühlborn, Sabine

Journal:

Phosphorous and Sulfur and the Related Elements

Year:

1985

Language:

english

File:

PDF, 161 KB

english, 1985

44

DOES PHENYLPHOSPHINIDENE EXIST? - MASS SPECTROMETRIC GENERATION AND CHARACTERIZATION OF Ph-P

Keck, Helmut, Kuchen, Wilhelm, Terlouw, Johan K., Tommes, Peter

Journal:

Phosphorus Sulfur and Silicon and the Related Elements

Year:

1999

Language:

english

File:

PDF, 257 KB

english, 1999

45

CARBAMOYL AND THIOCARBAMOYL DERIVATIVES OF N-BENZYL-AMINOMETHYL-DIMETHYL-PHOSPHINE OXIDE

Tashev, Emil, Lachkova, Viktoria, Keck, Helmut, Shenkov, Stoycho, Kläui, Wolfgang, Varbanov, Sabi

Journal:

Phosphorus Sulfur and Silicon and the Related Elements

Year:

2004

Language:

english

File:

PDF, 144 KB

english, 2004

46

CARBAMOYL AND THIOCARBAMOYL DERIVATIVES OF AMINOMETHYL-DIMETYL-PHOSPHINE OXIDE

Lachkova, Victoria, Varbanov, Sabi, Keck, Helmut, Tosheva, Tania

Journal:

Phosphorus Sulfur and Silicon and the Related Elements

Year:

1999

Language:

english

File:

PDF, 486 KB

english, 1999

47

ZUR EXISTENZ VON “H 3 PS” UND SEINES RADIKALKATIONS IN DER GASPHASE

Keck, Helmut, Kuchen, Wilhelm, Renneberg, Heike, Terlouw, Johan K.

Journal:

Phosphorous and Sulfur and the Related Elements

Year:

1988

Language:

english

File:

PDF, 345 KB

english, 1988

48

MASSENSPEKTROMETRISCHE UNTERSUCHUNGEN AN ORGANOPHOSPHORVERBINDUNGEN IV. 1 Über den massenspektrometrischen Zerfall von Dithiophosphinsären

Keck, Helmut, Kuchen, Wilhelm

Journal:

Phosphorous and Sulfur and the Related Elements

Year:

1983

Language:

english

File:

PDF, 259 KB

english, 1983

49

MASSENSPEKTROMETRISCHE UNTERSUCHUNGEN AN ORGANOPHOSPHORVERBINDUNGEN I Zum Massenspektrometrischen Fragmentierungsverhalten von Dithio- und Thiophosphonsäureanhydriden

Keck, Helmut, Kuchen, Wilhelm

Journal:

Phosphorous and Sulfur and the Related Elements

Year:

1978

Language:

english

File:

PDF, 469 KB

english, 1978

50

GASEOUS DIPHOSPHORUS AND TRIPHOSPHORUS SULFIDE: GENERATION AND IDENTIFICATION BY NEUTRALIZATION-REIONIZATION MASS SPECTROMETRY

Keck, Helmut, Kuchen, Wilhelm, Tommes, Peter, Terlouw, Johan K., Wong, Thomas

Journal:

Phosphorus Sulfur and Silicon and the Related Elements

Year:

1991

Language:

english

File:

PDF, 385 KB

english, 1991